Electric-arc lamp.



N0. 693,044. S. M. MEYER.

ELECTRIC AHC LAMP.

(Application med mar. 12.1901.)

Patented Feb. II,' |902.

(un Model.) 2 slums-sheetl l.

TH: Nbims PETERS co. Pacto-Limo.. wAsHmGToN, |:r4 c.

Patented Feb. n, |902. s. M. MEYER. r ELI-:Gmc Anc LAMP.

(Application led Max'. 12, 1901.)

2 Sheets-Sheet 2.

(N0 Model.)

y HUQMIOM gre/'1d Marfil? Meyer.

UNITED STATES PATENT OFFICE.,

SVEND MARTIN MEYER, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE- HALF TO FRANK O. KOIIART, OF BROOKLYN, NEW YORK.

ELECTRIC-ARC I Alvlli.

SPECIFICATION forming part of Letters Patent No. 699,041, dated February 1 1, 1902.

Application iiled March 12, 1901. Serial No. 50,785. (No model.)

T0 alvwwm it may concern:

Be it known thatl, SvEND MARTIN MEYER, a subject of the King of Denmark, and a residentof Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Arc-Lamps, of which the following is a specification.

This invention relates vto improvementsin electric-arc lamps, and has for its object the` production of an arc-lamp in a simple form and of a construction such that it will burn on an incandescent-lamp circuit and may be -and of course it may enter into any regular arc-lamp installation.

The invention consists in the construction,

combination, and arrangement of parts here-v inafter fully described, and set forth in the claims.

In the accompanyingdrawings, which form a part of this specication, Figure 1 represents, in partial vertical section, one form in which my improvements in electric-arc lamps may be embodied. Fig. 2 represents a hori-v zontal section through the lamp mechanism,

taken on the line 2 2, Fig. 1 the upper partof the casing having been removed. VFigl- 3 is a partially-sectionized elevation of aportion of the lamp-frame. Fig. ishows in perspective a connector by means of which the lamp may be placed in circuit with any incandes'cent-lamp fixture. l

-As above stated, the lamp is well adapted for a droplight,and it has been shownv in that form. The mechanism of the'lamp may be mountedin any suitable frame. lIn the structure shown said frame consists of the lower plate, the upper plate 6, connected to the lower plate by supports 7, and the guiderods 8, mounted upon the plate 6. Upon the plate 6.and centrally located in respect therevto and insulated therefrom is a lower-carbon Fig; 2. with jaws, preferably conformed tothe conholder 9, the lower carbon 10 being secured therein by a set-screw, as 11. The upper-carbon holder is shown at 12, and .consists of a suitable socket for receiving the upper carbon'13 andguides at the sides thereof, which are located upon the guide-rods 8. This carboniholder is joined bya flexible connection,

`such as a chain, (indicated at 14,) to a differential pulley 15, journaled between one of lthe uprights 7 and a bracket, as 16, depending from the plate 6. To the smaller sheave of the pulley 15 is connected, by a iiexible connection 17, a solenoid-core, as 18, which is movably suspended in the solenoid 19, at-

'tached to or otherwise suitably supported beneath .the plate 5. The weight of the core 18 `and that of vthe carbon-holder 12 are so proportioned that the latter shall slightly over- ,balance V'the former, thereby tending constantly to settle the upper carbon upon the lower carbon.

One of the essential features by which th ymechanism of my improved lamp is simplified Iis a magnetic clutch. This clutch I so construct and locate that it shall engage the core 18 to regulate the descent thereof, and therefore the separation of the carbons, in striking the arm. AThe magnetization of the core 18, induced by the circuit iiowing in the coil 19, is depended upon for the operationv of this clutch. To this end the clutch consists of a tilting platform 20, mounted upon the plate 5 between posts 21, and the clutch members 22, pivoted upon this platform, as seen in These clutch members are provided tour 0f the core 18, and are normally withdrawn from said core by means of a spring 23 joining their rearward ends. Also there is located between the clutch members an adjusting-screw 24, the under side of whose head is conical, as seen in Fig. 1, whereby the dis-v tance between the jaws of the clutchand the rod 18 may be regulated'. The platform 20 is preferably made to rest normally upon a stoplscrew 25, and for this purpose its rearward end is preferably weighted so as to overbalance the weight of the jaws ofthe clutch. The weight for accomplishing this purpose may be produced b v thickening the platform at the rear of the supports 21, as clearly inroo dicated in Fig. l. Normally, then, the platform will rest upon the stop-screw Its tilting movement under the action of the core 18 when drawn into the solenoid may be regulated and limited in any suitable manneras, for instance, by the screw 26, which has a collar thereon, as shown at 27, with which the platform shall engage as it is tilted. The platform is shown in tilted position by dotted lines in Fig. 1.

Any suitable cut-out switch may be used in the circuit this lamp, and a simple form for such switch is illustrated, whereof one contact is shown at 28 as mounted upon and insulated from the plate 6, said contact being preferably connected to the binding-post to which the circuit 29 of the lamp is connected.

f 'lhe movable contact for engagement with the contact 28 is shown at 30 and is attached to and operated by the rod 31 journaled in a lug depending from the plate 6 and in the side of the nut 32, by which the lower-carbon holder is held in place.

The circuit of the lamp 29, just referred to, extends from one of the protruding lamp-terminals (seen at 32, Fig. 1) to plate 6 of the lamp-frame. Thence the current passes to the upper carbon through the frame, thence through the lower carbon to the rod 3l of the switch, and when the switch is closed from contact 30 on said rod to contact 28, and thence by conductor 29 to and through the coil 19 to the rheostat 33 in the base of the lamp,whence said circuit leads to the other terminal 32. The controlling-lever of the rheostat may project from the base of the lamp, as shown at 34. This lamp operates perfectly well as an inclosed-arc lamp and is sh own in the drawings provided with the arc-inclosing globe 35.

A convenient mode of connecting the lamp to an incandescent or other fixture is illustrated in Fig. 4, wherein an ordinary incandescent-lamp plug is represented at 36 joined to a connector 37 by means of exible conductors 38, said connector consisting of two metallic tubes located in a piece of fiber or other insulation and adapted to engage with the protruding terminals 32 of the lamp.

When the lamp is connected in circuit and the switch 31 closed, the core 18 is immediately attracted and starts into the solenoid;- but immediately following this starting of the core it, by virtue of the magnetism induced therein by the coil, attracts the jaws of the clutch, which limits the downward movement of the core to the distance required for producing the necessary separat-ion of the carbons, the extent of the downward movement of the core, and therefore the separation of the carbons,bein g regulated in the main by means of the screw 26 and the adjustable stop 25. This regulation is further refined by means of the screw 23, since thereby is determined the distance that the jaws of the clutch must travel before they can engage the core 18, and therefore the distance that the core 18 can travel after switch 31 is closed before it is grabbedby the clutch. Therefore by means of these three screws 23, 25, and 26 a very even and accurate adjustment of the length of arc may be obtained. When the carbons have burned away sufciently to demagnetize the core 18, (which is preferably of low magnetic quality,) the clutch will release the core and the Weighted carbon holder will cause the carbons to come together, whereupon the action above described in striking the arc will again take place.

In alamp of the structure shown and described a small and short solenoid is sufficient for the feeding operation, and it will be noted that the coil performs two functions-namely, that of a choke-coil or resistance in the lampcircuit as well as that of attracting and magnetizing the core 18.

Many changes may be made in the manner of mounting the essential features of my lamp and in the form and construction of such means of mounting, and many changes may likewise be made in the form and arrangement of the parts constituting said essential features, without departing from my invention.

I claim as my invention- 1. In an electric-arc lamp having a coil in the circuit of the carbons, a core in said coil, a carbon-holder connected to said core, and a magnetic clutch energized by said coil and engaging said core to control the movement of the carbon-holder.

2. An electric-arc lamp having a coil in the 'circuit of the carbon, a movable core in said coil and connected to one of the carbon-holders, and a magnetic clutch grasping said core and controlling the movement thereof.

Ioo

3. An electric-arc lamp having a coil in the circuit of the carbon, a movable core in said coil and connected to one of the carbon-holders, a magnetic clutch engaging said core and actuated by said coil to control the feeding of the carbons.

4. In an electric-arc lamp, a coil in the circuit of the carbons,a magnetizable core in said coil connected to a movable carbon-holder, and a clutch consisting of pivoted magnetic members attracted to the core through the action of said coil and grasping it to regulate the feed of the carbone.

5. In an electric-arc lamp, a coil in the c'ir' cuit of the carbons, a core of low magnetic quality suspended in said coil connected to a movable carbon-holder, and a tilting clutch having pivoted iron jaws for engaging said core to regulate the feed, said core being magnetized by current in said coil to attract said jaws for the purpose set forth.

6. In an electric-arc lamp, a solenoid having a movable core connected to a movable carbon and a magnetically-actuated feedingclutch for engaging said core and controlling the feed.

7 In an electric-arc lamp, a solenoid having a movable core connected to a movable carbon, a tilting platform, clutch members of IXO soft iron pivoted thereon, and a spring tending to hold the clutch open, said clutch being attracted into engagement with the core when the solenoid is energized.

8. In an electric-arc lamp, a feeding mechanism consisting of a solenoid having a movable core and a tilting -`clutch magnetically actuated to engage said core and controlling the movement thereof, the magnetic influence arising from the current in the solenoid.

9. The combination with the movable carbonzholder, of the solenoid, the movable core of the solenoid, the tilting platform, the pivoted clutch members thereon for engaging said core, means for regulating the movement of the platform, and means for adjusting the distance of the clutch members from the core, for the purpose set forth.

10.'.The combination with the movable carbon-holder, of the differential pulley, the so. lenoid, the movable core of the solenoid, the

flexible connection between the core and pulble connection for attachment to said terminals, for the purpose set forth.

Signed at New York, in the county of New York and State of New York, this 8th day of March,A. D. 1901.

SVEND MARTIN MEYER.

Witnesses: v

' DELBERT H. DECKER,

ETHEL L; LAWLER. 

